5分之6-9分之2-9分之7
=6/5-(2/9+7/9)
=6/5-1
=1/5
6分之5+15分之4+15分之1+6分之7
=(5/6+7/6)+(4/15+1/5)
=2+1/3
=2又1/3
简便法计算.5分之6-9分之2-9分之7 6分之5+15分之4+15分之1+6分之7
简便法计算.5分之6-9分之2-9分之7 6分之5+15分之4+15分之1+6分之7
数学人气：137 ℃时间：2020-04-07 10:27:57
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